| 2. | Surface prep or " cleaning " is a separate process designed to safely remove swirls , scratches , acid rain etchings , pore - imbedding stains , tree sap , dead - oxidized paint , as well as stubborn surface contaminants that regular washing will not remove 预洗表面或“清洁”与安全的去除螺旋纹、划痕、酸雨的腐蚀物、镶嵌在小孔的灰尘、树液、被氧化的漆面、顽固的污物,即一般很难清洗掉的污物是两回事儿。 |